What does GASC stand for?

Gas-Analysis Sample Container - Apollo - NASA

Georgia, Ashburn, Sylvester & Camilla R. R. - AAR code

German-American Securitie Corporation, Boston (SAUO)

German-American Securities Corp. (BARN)

Graphic and Software Communication System (SAUS)

Graphic Arts Show Co., Inc. (DGA)

Ground Air Support Command (SAUS)

Guggenheim Aviation Supply Control (SAUO)

Gurkha Army Service Corps - British military (DMA)